US4063356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand knife
Assignee: Plasplugs Ltd
•
Filing: 1976-08-23
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Granted: 1977-12-20
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Expires: 1996-08-23
Abstract
Abstract The invention relates to hand knives of the type comprising a hand grip which houses a strip steel blade with snap-off ends, which when worn can be removed to reveal a fresh operative blade tip. The hand grip comprises an elongated body with a longitudinal slot along which a blade-shifting element of stiffly flexible construction may be moved between a variety of adjustable positions.
Inventors
- 👤 Paul Steabben Hepworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
B; B26; B26B; B26B5/00; B26B5/001; B26B5/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A hand knife suitable to house a strip steel blade with snap-off ends comprising an elongated body defining therein a longitudinal passageway for the blade, and having a longitudinal slot in communication with at least a portion of the length of said passageway, a blade shifting element, said longitudinal passageway receiving and permitting movement of said blade shifting element, a set of fixed detent formations in said body co-operating with complementary formations on said knife-shifting element to engage and locate the shifting element in a selected adjusted position, and said body being provided with a removable end portion, said end portion having a slot into which a worn portion of the blade may be received and snapped off when the end portion is removed for use.
Claim 2
Dependent Claim
126 words
A hand knife suitable to house a strip steel blade with snap-off ends comprising an elongated body defining therein a longitudinal passageway for the blade, and having a longitudinal slot in communication with at least a portion of the length of said passageway, a blade shifting element, said longitudinal passageway receiving and permitting movement of said blade shifting element, a set of fixed detent formations in said body co-operating with complementary formations on said knife-shifting element to engage and locate the shifting element in a selected adjusted position, and said body being provided with a removable end portion, said end portion having a slot into which a worn portion of the blade may be received and snapped off when the end portion is removed for use.
Claim 3
Dependent Claim
48 words
A hand grip as claimed in claim 1, wherein the body comprises two interengaged portions, one forming a base portion and the other a closure portion for the passageway, the slot being formed in the cover portion and being flanked by splines or serrations comprising said detent formations.
Claim 4
Dependent Claim
53 words
A hand grip as claimed in claim 2, wherein the bladeshifting element is of stiffly flexible plastics material and comprises a head portion adapted to receive finger pressure to flex the element, and two wing portions bearing serrations, which engage with the detent formations on the cover portion when the element is unflexed.
Claim 5
Dependent Claim
26 words
A hand grip as claimed in claim 1, wherein the bladeshifting element is provided with a projection or stud engageable with an aperture in the blade.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |